Irrigation Planner

Step 1 - Measure your water supply

Available flow (GPM)

If you have not measured it, use the bucket helper below - a real number makes every later step honest.

Step 2 - Define the area

Irrigated area (sq ft) Head spacing (ft)

Match the nozzle throw radius - head-to-head coverage.

Step 3 - Choose the system type

System type Sprinklers (lawn) Drip irrigation (beds)

Step 4 - Pick the hardware

Step 5 - Zone design

Zones are split so no valve ever draws more than 80% of your measured supply.

Step 6 - Build the schedule

Weekly watering target (inches)

Cool-season lawn 1-1.5 in summer; shrubs 0.5-0.75.

Watering days per week

Step 7 - Budget the water

Reference ET (inches/week)

Summer ET0 is typically 1-2 in/week in the US; your local extension publishes it.

Plant coefficient (Kc) Application efficiency (%) Effective rainfall (inches/week) Water rate ($ per 1,000 gallons)

Step 8 - Your irrigation plan

Copy plan as text

This is a planning estimate generated from your inputs and published design formulas. Verify pressure, flow and coverage on site before installation.